<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns:sa="http://www.opengis.net/sampling/1.0" xmlns="http://www.w3.org/2001/XMLSchema"
        xmlns:gml="http://www.opengis.net/gml" xmlns:gmd="http://www.isotc211.org/2005/gmd"
        xmlns:om="http://www.opengis.net/om/1.0" targetNamespace="http://www.opengis.net/sampling/1.0"
        elementFormDefault="qualified" attributeFormDefault="unqualified" version="1.0.0">
	<annotation>
		<documentation>surveyProcedure.xsd

Components to describe procedures used in sampling.

Sampling is an OGC Standard.
Copyright (c) 2007,2010 Open Geospatial Consortium, Inc. All Rights Reserved.
To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ .
		</documentation>
	</annotation>
	<!-- ====================================================================== -->
	<!-- bring in other schemas -->
	<import namespace="http://www.opengis.net/gml" schemaLocation="../../gml/3.1.1/base/gml.xsd"/>
	<!-- GMD cannot be used with GML 3.1.1
		<import namespace="http://www.isotc211.org/2005/gmd" schemaLocation="../../iso/19139/20070417/gmd/gmd.xsd"/>
	-->
	<import namespace="http://www.opengis.net/om/1.0" schemaLocation="../../om/1.0.0/om.xsd"/>
	<!-- ====================================================================== -->
	<!-- ====================================================================== -->
	<complexType name="SurveyProcedureType">
		<annotation>
			<documentation>Specialized procedure related to surveying positions and locations.</documentation>
		</annotation>
		<complexContent>
			<extension base="gml:AbstractFeatureType">
				<sequence>
					<element name="operator" type="sa:AnyOrReferenceType" minOccurs="0"/>
					<!-- Replace with
					<element name="operator" type="gmd:CI_ResponsibleParty_PropertyType" minOccurs="0"/>
					when upgrading to GML 3.2
					-->
					<element name="elevationDatum" type="gml:ReferenceType" minOccurs="0"/>
					<!-- Replace with
					<element name="elevationDatum" type="gml:VerticalDatumPropertyType" minOccurs="0"/>
					when upgrading to GML 3.2
					-->
					<element name="elevationMethod" type="om:ProcessPropertyType" minOccurs="0"/>
					<element name="elevationAccuracy" type="gml:MeasureType" minOccurs="0"/>
					<element name="geodeticDatum" type="gml:ReferenceType" minOccurs="0"/>
					<!-- Replace with
					<element name="geodeticDatum" type="gml:GeodeticDatumPropertyType" minOccurs="0"/>
					when upgrading to GML 3.2
					-->
					<element name="positionMethod" type="om:ProcessPropertyType"/>
					<element name="positionAccuracy" type="gml:MeasureType" minOccurs="0"/>
					<element name="projection" type="gml:ReferenceType" minOccurs="0"/>
					<!-- Replace with
					<element name="projection" type="gml:SingleCRSPropertyType" minOccurs="0"/>
					when upgrading to GML 3.2
					-->
					<element name="surveyTime" type="gml:TimePrimitivePropertyType" minOccurs="0"/>
				</sequence>
			</extension>
		</complexContent>
	</complexType>
	<!-- ...................... -->
	<element name="SurveyProcedure" type="sa:SurveyProcedureType" substitutionGroup="gml:_Feature">
		<annotation>
			<documentation>Specialized procedure related to surveying positions and locations.</documentation>
		</annotation>
	</element>
	<!-- ...................... -->
	<complexType name="SurveyProcedurePropertyType">
		<sequence minOccurs="0">
			<element ref="sa:SurveyProcedure"/>
		</sequence>
		<attributeGroup ref="gml:AssociationAttributeGroup"/>
	</complexType>
	<!-- ====================================================================== -->
		<!-- ====================================================================== -->
	<complexType name="AnyOrReferenceType">
		<annotation>
			<documentation>Placeholder type</documentation>
		</annotation>
		<sequence minOccurs="0">
			<any/>
		</sequence>
		<attributeGroup ref="gml:AssociationAttributeGroup"/>
	</complexType>
	<!-- ====================================================================== -->

</schema>
